Polygonum aviculare

Prostrate Knotweed


Door-weed, Knot-grass, Mat-grass

ID Characteristics

Life cycle: Summer annual
Growth Habit: Prostrate
Propagation: Seed
Leaf Margin: Smooth
Leaf Hairs: None
Leaf Structure: Lanceolate or elliptic to oblong
Leaf Arrangement: Alternate
Root Type: Taproot
Flower Color: White to green with pinkish margins



Similar Species

Herbicidal Control Options

  • Preemergence: Dithiopyr, Isoxaben, Napropamide, Oryzalin, Pendimethalin, Prodiamine, Pronamide
  • Post Emergence: Bromoxynil, Carfentrazone, Chlorsulfuron, Clopyralid, Dicamba, Florasulam, Fluroxypyr, Metribuzin, Sulfentrazone

Please note: one or more of these active ingredients may exist in combination-type brand name products. Any material used for herbicidal control of any plant may vary in efficacy. Please read the full disclaimer on herbicide usage.